Roller wheel



FIG. 1 is a perspective view of the roller wheel embodying the design of the present invention;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown in FIG. 2; and,

FIG. 3 is a typical elevational view thereof, all elevational views being identical to the view shown in FIG. 3. 

The ornamental design for a roller wheel, as shown and described. 